Filter cartridge assembly and water purifier

Abstract

The present application provides a filter cartridge assembly and a water purifier. The filter cartridge assembly comprises a waterway board, a pretreatment filter cartridge, a reverse osmosis filter cartridge, a three-way valve, a pressure tank, and a check valve, wherein the waterway board comprises a board body, a plurality of filter cartridge mounting seats, and a waterway formation member; the central axes of the plurality of filter cartridge mounting seats define a central axial plane, and the plurality of filter cartridge mounting seats comprise a first mounting seat and a second mounting seat; the pretreatment filter cartridge is mounted coaxially with respect to the first mounting seat; the reverse osmosis filter cartridge is mounted coaxially with respect to the second mounting seat; the three-way valve is located on one side of the central axial plane; a first water inlet of the three-way valve is in communication with a water outlet of the pretreatment filter cartridge by means of a waterway, a water outlet of the three-way valve is in communication with a water inlet of the reverse osmosis filter cartridge by means of the waterway; and the pressure tank is in communication with a water outlet of the reverse osmosis filter cartridge and a second water inlet of the three-way valve by means of the waterway.

Description

A filter cartridge assembly and a water purifier Technical Field

[0001] This application relates to the field of water purification technology, and in particular to a filter element assembly and a water purifier. Background Technology

[0002] Currently, water purifiers are widely used. They can deeply filter impurities in water and from water pipes, providing people with cleaner drinking water and thus better protecting the health of users.

[0003] In related technologies, the filter element assembly is equipped with a water channel plate to install multiple filter elements and multiple functional components. The water channel plate has water channels that connect multiple filter elements and multiple functional components, and the central axis of multiple filter elements defines a central axis surface.

[0004] Typically, the central axial plane is transversely cut across each filter element and each functional component, which results in a very long length of the filter element assembly in the direction of the arrangement of each filter element, thus leading to a large overall size of the water purifier. Summary of the Invention

[0005] This application provides a filter cartridge assembly and a water purifier, aiming to improve the problem of the large overall size of the water purifier.

[0006] To address the aforementioned technical problems, this application provides a filter element assembly, which includes:

[0007] A water circuit board includes a board body, a plurality of filter element mounting seats disposed on the board body, and a water circuit structure disposed on the filter element mounting seats. The central axis of the plurality of filter element mounting seats defines a central axis surface. The water circuit structure has a water circuit that connects the plurality of filter element mounting seats in sequence. The plurality of filter element mounting seats include at least a first mounting seat and a second mounting seat.

[0008] The pretreatment filter element is coaxially mounted with the first mounting base to connect to the water circuit;

[0009] The reverse osmosis filter element is coaxially mounted with the second mounting base to connect to the water circuit, and along the water flow direction, the reverse osmosis filter element is located downstream of the pretreatment filter element;

[0010] A three-sided valve is installed on the water circuit structure and located on one side of the central axis surface. The first inlet of the three-sided valve is connected to the outlet of the pretreatment filter element through the water circuit, and the outlet of the three-sided valve is connected to the inlet of the reverse osmosis filter element through the water circuit.

[0011] The pressure tank is connected to the outlet of the reverse osmosis filter element and the second inlet of the three-sided valve via the water passage; and

[0012] A one-way valve is installed between the reverse osmosis filter element and the pressure tank, allowing water from the reverse osmosis filter element to flow unidirectionally to the pressure tank.

[0013] In some embodiments, the three-sided valve is located between the first mounting base and the second mounting base.

[0014] In some embodiments, the inner wall of the water passage is recessed with a relief groove, the bottom of the relief groove is connected to the outlet of the water passage plate, and the relief groove is located between the connection port of the water passage connecting the pressure tank and the one-way valve.

[0015] In some embodiments, the filter assembly further includes:

[0016] A pressure pipe is installed on the water circuit structure and located on the side of the central axis away from the three-sided valve. The pressure tank is connected to the second water inlet through the pressure pipe.

[0017] In some embodiments, the one-way valve is mounted on the water passage structure and located on the side of the central axis opposite to the three-sided valve.

[0018] In some embodiments, the one-way valve and the pressure tube are partially stacked and spaced apart in the vertical direction.

[0019] In some embodiments, the filter assembly further includes:

[0020] A wastewater valve is installed on the water circuit structure and located on one side of the central axis surface. The wastewater valve is connected to the wastewater outlet of the reverse osmosis filter element through the water circuit, allowing only the wastewater from the reverse osmosis filter element to flow unidirectionally to the drain outlet of the water circuit plate.

[0021] In some embodiments, the wastewater valve and the one-way valve are located on opposite sides of the central axial surface.

[0022] In some embodiments, the plurality of filter element mounts further include a fourth mount, and the filter element assembly further includes:

[0023] The post-treatment filter element is coaxially mounted with the fourth mounting base to connect to the water path, and along the water flow direction, the post-treatment filter element is located downstream of the reverse osmosis filter element;

[0024] Wherein, the one-way valve is located between the second mounting base and the fourth mounting base; and / or,

[0025] The wastewater valve is located between the second mounting base and the fourth mounting base.

[0026] In some embodiments, the plurality of filter element mounts further include a fifth mount, and the filter element assembly further includes:

[0027] The mineralizing filter element is coaxially mounted with the fifth mounting base to connect to the water path, and along the water flow direction, the mineralizing filter element is located downstream of the post-treatment filter element.

[0028] In some embodiments, the filter assembly further includes:

[0029] A flow meter is installed on the water circuit structure to connect to the water circuit, and along the water flow direction, the flow meter is located upstream of the pretreatment filter element, and the central axial surface is transverse to the flow meter.

[0030] In some embodiments, the filter assembly further includes:

[0031] Alarms; and,

[0032] The circuit board is electrically connected to the flow meter and the alarm, and the circuit board can control the alarm to work based on the detection results of the flow meter.

[0033] In some embodiments, the filter assembly further includes:

[0034] The battery is electrically connected to the circuit board and is configured to power the circuit board, the flow meter, and the alarm.

[0035] In some embodiments, the water circuit board has a receiving groove located on one side of the central axis surface, and the circuit board, the alarm, and the battery are all installed in the receiving groove.

[0036] In some of these embodiments, the receiving slot is positioned adjacent to the flow meter.

[0037] In some embodiments, the filter assembly further includes:

[0038] A cover is provided on the opening of the receiving groove to seal the receiving groove.

[0039] In some embodiments, the plurality of filter element mounts further include a third mount, and the filter element assembly further includes:

[0040] The PP cotton filter element is coaxially mounted with the third mounting base to connect to the water path, and along the water flow direction, the PP cotton filter element is located upstream of the flow meter.

[0041] In some embodiments, the waterway includes:

[0042] The first flow channel has one end connected to the inlet of the water circuit board, and the other end connected to the inlet of the PP cotton filter element through the third mounting base. The outlet of the PP cotton filter element is connected to the inlet of the flow meter through the third mounting base.

[0043] The second flow channel is connected at one end to the outlet of the flow meter and at the other end to the inlet of the pretreatment filter element through the first mounting base.

[0044] The third flow channel has one end connected to the outlet of the pretreatment filter element through the first mounting base, and the other end connected to the first inlet of the three-sided valve.

[0045] The fourth flow channel is connected at one end to the outlet of the three-sided valve and at the other end to the inlet of the reverse osmosis filter element through the second mounting base.

[0046] The fifth flow channel is connected at one end to the outlet of the reverse osmosis filter element via the second mounting base, and at the other end to the inlet of the one-way valve.

[0047] The wastewater channel has one end connected to the wastewater outlet of the reverse osmosis filter element via the second mounting base, and the other end connected to the wastewater valve.

[0048] The sixth flow channel is connected at one end to the outlet of the one-way valve, at the other end to the pressure tank, and is connected to the inlet of the post-treatment filter element through the fourth mounting base, and is also connected to the second inlet of the three-sided valve through the pressure pipe.

[0049] The seventh flow channel has one end connected to the outlet of the post-treatment filter element via the fourth mounting base, and the other end connected to the inlet of the mineralization filter element via the fifth mounting base; and

[0050] The eighth flow channel is connected at one end to the outlet of the mineralized filter element via the fifth mounting base, and at the other end to the outlet of the water circuit plate.

[0051] In some embodiments, the central axial surface transversely cuts through the second flow channel, the third flow channel, the fourth flow channel, the wastewater channel, and the seventh flow channel;

[0052] The fifth channel is located on the side of the central axial surface where the one-way valve is located.

[0053] In some embodiments, the distance between the central axes of two adjacent filter element mounting bases is 'a', where 57mm ≤ a ≤ 141mm.

[0054] In some of these embodiments, the pretreatment filter element includes a filter element body and a drive unit, the drive unit being mounted on the filter element body, and all filter element mounting bases having the same structure.

[0055] The first mounting base includes:

[0056] The base is connected to the waterway;

[0057] A rotating component, rotatably mounted on the base, to connect or block the water passage; and

[0058] A transmission unit is disposed on the rotating member;

[0059] The driving unit can be plugged into the corresponding transmission unit to drive the rotating component to rotate.

[0060] In some embodiments, the pretreatment filter element further includes a guide portion mounted on the filter element body;

[0061] The base is provided with a mounting groove, the rotating component is rotatably mounted on the bottom of the mounting groove, and the transmission part is located on the surface of the rotating component opposite to the bottom of the mounting groove.

[0062] The first mounting base further includes:

[0063] A guide protrusion protrudes from the wall of the mounting groove and extends circumferentially along the mounting groove;

[0064] The guide portion can extend between the guide protrusion and the bottom of the mounting groove.

[0065] In some embodiments, the first mounting base further includes:

[0066] The limiting protrusion has one end connected to one end of the guide protrusion in the circumferential direction of the mounting groove, and the other end extends along the axial direction of the mounting groove toward the bottom of the mounting groove.

[0067] In some embodiments, the number of guide portions of the pretreatment filter element is two;

[0068] The number of the guide protrusion and the limiting protrusion are both two. The two guide protrusions are spaced apart in the circumferential direction of the mounting groove to form two clearance channels. The guide protrusion and the limiting protrusion are arranged in a one-to-one correspondence.

[0069] The limiting protrusion is disposed at the end of the corresponding guide protrusion away from the other limiting protrusion.

[0070] In some embodiments, a guide ramp is provided on the side where the guide protrusion connects to the limiting protrusion, and the guide ramp extends from the bottom of the mounting groove toward the adjacent clearance channel.

[0071] In some embodiments, the guide protrusion is recessed into a positioning groove on one side facing the bottom of the corresponding mounting groove;

[0072] The pretreatment filter element also includes:

[0073] The positioning part protrudes from the surface of the guide part facing the guide protrusion;

[0074] When the first mounting base is connected to the water channel, the positioning part is inserted into the positioning groove.

[0075] This application also provides a water purifier, the water purifier comprising:

[0076] The outer casing; and

[0077] The aforementioned filter element assembly;

[0078] The outer casing is located on the side of the water passage structure opposite to the filter element mounting base.

[0079] In some embodiments, the water purifier further includes:

[0080] Decorative panels are installed on the outer peripheral wall of the housing.

[0081] In some embodiments, the water purifier includes:

[0082] The housing has an installation cavity, in which the filter element assembly is installed.

[0083] In this embodiment, the filter assembly and water purifier incorporate a three-sided valve on the water circuit structure, positioned on one side of the central axis. This fully utilizes the space on both sides of the central axis, reducing the volume of the water circuit board and consequently the overall size of the water purifier. Furthermore, a pressure tank is installed downstream of the reverse osmosis filter to improve the water purifier's output efficiency. Simultaneously, the three-sided valve, in conjunction with the pressure tank, allows for the control of water flow, preventing excessive pressure buildup in the pressure tank and potential rupture of the pressure tank or water circuit structure due to high pressure, thus enhancing the overall reliability of the device. Attached Figure Description

[0084] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0085] Figure 1 is a schematic diagram of the structure of the water purifier provided in the embodiment of this application;

[0086] Figure 2 is a partial structural schematic diagram of the filter element assembly in one embodiment of this application;

[0087] Figure 3 is a cross-sectional view of the filter element assembly in Figure 2;

[0088] Figure 4 is a partial exploded view of the filter element assembly in Figure 2;

[0089] Figure 5 is a partial enlarged view of the water circuit board in one embodiment of this application;

[0090] Figure 6 is a partial structural schematic diagram of the water channel plate in one embodiment of this application;

[0091] Figure 7 is a schematic diagram of the structure of the pretreatment filter element in one embodiment of this application.

[0092] Explanation of reference numerals in the attached figures:

[0093] 1000, Water purifier; 100, Filter cartridge assembly; 110, Water circuit board; 111, Board body; 112, Filter cartridge mounting base; 1121, First mounting base; 1122, Second mounting base; 1123, Third mounting base; 1124, Fourth mounting base; 1125, Fifth mounting base; 112a, Base body; 112b, Rotating component; 112c, Transmission part; 112d, Mounting groove; 112e, Guide protrusion; 112f, Limiting protrusion; 112g, Clearance channel; 112h, Guide slope; 112i, Positioning groove; 113, Water circuit structure; 1131, Water circuit; 113a, First flow channel; 113b, Second flow channel; 113c, Third flow channel; 113d, Fourth flow channel; 113e, Fifth flow channel; Five flow channels; 113f, wastewater channel; 113g, sixth flow channel; 113h, seventh flow channel; 113i, eighth flow channel; 113j, clearance groove; 113k, water-blocking part; 114, central axis surface; 115, receiving groove; 116, cover; 100a, pretreatment filter element; 101a, filter element body; 102a, drive unit; 103a, guide unit; 104a, positioning unit; 100b, reverse osmosis filter element; 100c, PP cotton filter element; 100d, posttreatment filter element; 100e, mineralization filter element; 120, flow meter; 130, circuit board; 140, three-way valve; 150, pressure tank; 160, one-way valve; 170, pressure pipe; 180, wastewater valve; 200, outer shell; 300, decorative panel. Detailed Implementation

[0094] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0095] Please refer to Figures 1 and 2 together. This application provides a filter element assembly 100 and a water purifier 1000. The filter element assembly 100 includes a water circuit board 110, a pretreatment filter element 100a, a reverse osmosis filter element 100b, a three-way valve 140, a pressure tank 150, and a one-way valve 160.

[0096] Please refer to Figure 2. The water circuit board 110 includes a board body 111, multiple filter element mounting seats 112 disposed on the board body 111, and water circuit components 113. The board body 111 and the filter element mounting seats 112 can be integrally formed, or they can be detachably connected; no specific limitations are made here. The board body 111 can be made of many kinds of materials; it can be made of metal or a relatively hard plastic material; no specific limitations are made here.

[0097] Please refer to Figure 3. The central axis of the plurality of filter element mounting seats 112 defines a central axial surface 114. The plurality of filter element mounting seats 112 includes at least a first mounting seat 1121 and a second mounting seat 1122. It can be understood that the number of filter element mounting seats 112 is at least two, one of which is the first mounting seat 1121 and the other is the second mounting seat 1122. The filter element mounting seats 112 may also include a third mounting seat 1123, a fourth mounting seat 1124, etc., without specific limitations here. It should be noted that each filter element mounting seat 112 is located on the central axial surface 114, which can be understood as the plurality of filter element mounting seats 112 being arranged at intervals along the same direction.

[0098] The filter element mounting base 112 can be made of various materials. It can be made of metal or a relatively rigid plastic material; no specific limitation is made here. The filter element mounting base 112 can also have various shapes. It can be cylindrical, boss-shaped, or any other shape, as long as it matches the corresponding filter element; no specific limitation is made here.

[0099] Please refer to Figure 4. The water channel structure 113 has a water channel 1131 that connects multiple filter element mounting seats 112 sequentially. The water channel structure 113 can be made of various materials; it can be made of metal or a relatively rigid plastic material, without specific limitations. The water channel structure 113 can be integrally formed with the filter element mounting seats 112, or it can be detachably connected to them, without specific limitations. Preferably, the water channel structure 113 is integrally formed with the filter element mounting seats 112, which prevents water in the water channel 1131 from leaking out through the gap between the water channel structure 113 and the filter element mounting seats 112.

[0100] Please refer to Figure 4. The pretreatment filter element 100a is coaxially mounted with the first mounting base 1121 to connect to the water circuit 1131. The pretreatment filter element 100a can be one or more of the following: stainless steel filter element, PP cotton filter, ceramic filter, compressor filter, and activated carbon filter, etc., without specific limitations. The pretreatment filter element 100a can remove visible impurities such as silt, rust, and insect eggs from the water. There are many ways to install the pretreatment filter element 100a on the first mounting base 1121. The pretreatment filter element 100a can be installed on the first mounting base 1121 by plugging it in or by rotating and snapping it on, without specific limitations.

[0101] Please refer to Figure 4. The reverse osmosis filter element 100b is coaxially mounted with the second mounting base 1122 to connect to the water circuit 1131. Along the water flow direction, the reverse osmosis filter element 100b is located downstream of the pretreatment filter element 100a. This means that tap water first passes through the pretreatment filter element 100a before entering the reverse osmosis filter element 100b. The reverse osmosis filter element 100b can be composed of one or more of cellulose acetate and polyamide. Its main functions include filtering microorganisms, removing suspended solids, removing organic matter, and removing heavy metals, thereby effectively purifying the water and ensuring its safety and hygiene. There are many ways to install the reverse osmosis filter element 100b onto the second mounting base 1122. It can be installed by plugging it in or by rotating it to secure it. No specific limitation is made here.

[0102] Please refer to Figure 3. The three-sided valve 140 is installed on the water circuit structure 113 and located on one side of the central axis surface 114. The first inlet of the three-sided valve 140 is connected to the outlet of the pretreatment filter element 100a through the water circuit 1131, and the outlet of the three-sided valve 140 is connected to the inlet of the reverse osmosis filter element 100b through the water circuit 1131.

[0103] There are many possible installation positions for the three-way valve 140. The three-way valve 140 can be located on the side of the first mounting base 1121 away from the second mounting base 1122, or on the side of the second mounting base 1122 away from the first mounting base 1121. The three-way valve 140 can also be located between the first mounting base 1121 and the second mounting base 1122. Preferably, the three-way valve 140 is located between the first mounting base 1121 and the second mounting base 1122. This can shorten the length of the water path 1131 connecting the first inlet of the three-way valve 140 to the pretreatment filter element 100a, and also shorten the length of the water path 1131 connecting the outlet of the three-way valve 140 to the inlet of the reverse osmosis filter element 100b, thereby reducing the volume of the water path structure 113 and thus reducing the volume of the water purifier 1000. There are many ways to install the three-sided valve 140 on the water system component 113. The three-sided valve 140 can be installed on the water system component 113 by screw connection or by snap-fit ​​connection. No specific limitation is made here.

[0104] Please refer to Figure 1. The pressure tank 150 is connected to the outlet of the reverse osmosis filter element 100b and the second inlet of the three-way valve 140 via the water passage 1131. When the water purifier 1000 stops discharging water, the pressure tank 150 stores the water filtered by the reverse osmosis filter element 100b. The more water in the pressure tank 150, the greater the pressure it generates; conversely, the less water in the pressure tank 150, the lower the pressure it generates. Because the pressure tank 150 is connected to the second inlet of the three-way valve 140, the pressure in the pressure tank 150 is the same as the pressure at the second inlet of the three-way valve 140.

[0105] Considering that the slow filtration efficiency of the reverse osmosis filter 100b will result in low water output efficiency of the water purifier 1000, the pressure tank 150 is placed downstream of the reverse osmosis filter 100b. This allows the pressure tank 150 to store the water filtered by the reverse osmosis filter 100b. When the water purifier 1000 resumes water output, the pressure tank 150 can quickly supply water to the user, thereby improving the water output efficiency of the water purifier 1000.

[0106] There are many ways to connect the pressure tank 150 to the water circuit 1131. For example, the water circuit component 113 can have an external interface connecting to the water circuit 1131, and the pressure tank 150 can be connected to this external interface via an external pipe. Alternatively, the pressure tank 150 can be directly installed on the water circuit component 113, with its inlet and outlet directly connected to the water circuit 1131. No specific limitation is made here. Because the pressure tank 150 is relatively large, directly installing it on the water circuit component 113 would require a larger component to provide sufficient installation space. Therefore, it is preferable that the pressure tank 150 is connected to the water circuit 1131 via an external pipe. This allows the user to place the pressure tank 150 according to their actual needs, thus facilitating the placement of the water purifier 1000.

[0107] Referring to Figure 3, the one-way valve 160 is positioned between the reverse osmosis filter element 100b and the pressure tank 150, allowing water from the reverse osmosis filter element 100b to flow unidirectionally to the pressure tank 150. The one-way valve 160 prevents the pressure in the pressure tank 150 from affecting the reverse osmosis filter element 100b. The one-way valve 160 can be installed in various positions within the water circuit 113; it can be installed inside the water circuit 1131 or on the outer periphery of the water circuit 113. No specific limitation is made here. Preferably, the one-way valve 160 is installed in the water circuit 113 and located on the side of the central axis 114 opposite to the three-way valve 140. This fully utilizes the space on both sides of the central axis 114 of the water circuit 113, providing more space for the installation of the three-way valve 140 and the one-way valve 160, thus facilitating the assembly of the filter element assembly 100.

[0108] It should be noted that when the pressure at the second inlet of the three-sided valve 140 is greater than the pressure at the first inlet of the three-sided valve 140, the three-sided valve 140 will disconnect the connection between the first inlet and the outlet. When the pressure at the second inlet of the three-sided valve 140 is less than the pressure at the first inlet of the three-sided valve 140, the three-sided valve 140 will restore the connection between the first inlet and the outlet.

[0109] When the water purifier 1000 stops discharging water, the filter element assembly 100 continues to filter the tap water under the influence of the tap water pressure. At this time, the pressure at the first inlet of the three-way valve 140 is the tap water pressure. The tap water will pass through the pretreatment filter element 100a, the three-way valve 140 and the reverse osmosis filter element 100b in sequence into the pressure tank 150. The water stored in the pressure tank 150 gradually increases, which makes the pressure inside the pressure tank 150 gradually increase. When the water pressure inside the pressure tank 150 is greater than the tap water pressure, the three-way valve 140 will disconnect the connection between the first inlet and the outlet.

[0110] When the water purifier 1000 resumes water output, the pressure tank 150 will flow the stored water into the water circuit 1131. The water stored in the pressure tank 150 gradually decreases, causing the pressure inside the pressure tank 150 to gradually decrease. The pressure at the second inlet of the three-way valve 140 is less than the pressure at the first inlet. The three-way valve 140 will restore the connection between the first inlet and the outlet. The filter element assembly 100 filters the tap water under the drive of the tap water pressure.

[0111] In this embodiment, the filter assembly 100 and the water purifier 1000 have a three-sided valve 140 disposed on the water circuit structure 113, with the three-sided valve 140 located on one side of the central axis surface 114. This fully utilizes the space on both sides of the central axis surface 114 of the water circuit structure 113, thereby reducing the volume of the water circuit plate 110 and consequently the overall volume of the water purifier 1000. Furthermore, by placing a pressure tank 150 downstream of the reverse osmosis filter element 100b, the water output efficiency of the water purifier 1000 is improved. Simultaneously, the three-sided valve 140, in conjunction with the pressure tank 150, can control the flow of water through the water circuit 1131, preventing excessive pressure within the pressure tank 150 due to continuous water intake, which could lead to rupture of the pressure tank 150 or the water circuit structure 113 due to high pressure, thus improving the overall reliability of the machine.

[0112] Please refer to Figure 5. In some embodiments of this application, the inner wall of the water passage 1131 is recessed with a relief groove 113j. The bottom of the relief groove 113j is connected to the outlet of the water passage plate 110. The relief groove 113j is located between the connection port of the water passage 1131 connecting the pressure tank 150 and the one-way valve 160. With this arrangement, by recessing the relief groove 113j on the inner wall of the water passage 1131, when the water purifier 1000 starts discharging water, the water from the pressure tank 150 and the water flowing out of the one-way valve 160 flow into the relief groove 113j from both sides, so that the water from the pressure tank 150 and the water flowing out of the one-way valve 160 will not affect each other. Thus, the water from the pressure tank 150 and the water flowing out of the one-way valve 160 can be smoothly discharged from the outlet of the water passage plate 113, thereby improving the water output efficiency of the water purifier 1000.

[0113] The filter element assembly 100 connects the pressure tank 150 to the second inlet via a pressure pipe 170. One end of the pressure pipe 170 connects to the outlet of the one-way valve 160 and the pressure tank 150, while the other end connects to the second inlet of the three-way valve 140. Considering that the pressure pipe 170 needs to pass over the second mounting base 1122 before connecting to the three-way valve 140, and that the connection points of the pressure pipe 170 and the three-way valve 140 are both located on the same side of the central axis surface 114 where the three-way valve 140 is located, this would result in a relatively tight and cumbersome arrangement on that side of the central axis surface 114. Therefore, the pressure pipe 170 is installed on the water circuit structure 113, located on the side of the central axis surface 114 away from the three-way valve 140. In this case, the first inlet, second inlet, and outlet of the three-way valve 140 are all located on the surface of the three-way valve 140 facing the central axis surface 114. This configuration makes full use of the space on both sides of the central axis surface 114 of the water circuit structure 113, providing more space for the installation of the three-sided valve 140 and the pressure pipe 170, thus facilitating the assembly of the filter element assembly 100.

[0114] Furthermore, referring to Figure 3, the one-way valve 160 and the pressure pipe 170 are partially stacked and spaced apart in the vertical direction. This arrangement makes full use of the space in the vertical direction of the pressure pipe 170, thereby reducing the volume of the filter element assembly 100.

[0115] Referring to Figure 4, in some embodiments of this application, the filter element assembly 100 further includes a wastewater valve 180. The wastewater valve 180 is disposed on the water channel structure 113 and located on one side of the central axis surface 114. The wastewater valve 180 is connected to the wastewater outlet of the reverse osmosis filter element 100b through the water channel 1131, allowing only the wastewater from the reverse osmosis filter element 100b to flow unidirectionally to the drain outlet of the water channel plate 110. With this configuration, some water will wash away the minerals and contaminants deposited on the membrane surface of the reverse osmosis filter element 100b and discharge it from the system drain outlet through the drain outlet of the reverse osmosis filter element 100b and the drain pipe, thereby ensuring that the permeate flow and desalination capacity of the reverse osmosis filter element 100b do not decrease, thus guaranteeing the filtration effect. The wastewater valve 180 can prevent wastewater from the drain outlet of the water channel plate 110 from flowing back into the reverse osmosis filter element 100b. Meanwhile, the wastewater valve 180 is installed on the water circuit structure 113, and the wastewater valve 180 is located on one side of the central axis surface 114. This makes full use of the space on both sides of the central axis surface 114 of the water circuit structure 113, thereby reducing the volume of the water circuit plate 110 and thus reducing the overall volume of the water purifier 1000.

[0116] Furthermore, the wastewater valve 180 and the three-sided valve 140 are located on the same side of the central axis surface 114. It can be understood that the wastewater valve 180 and the three-sided valve 140 are located on one side of the central axis surface 114, and the one-way valve 160 is located on the other side of the central axis surface 114. This arrangement can make full use of the space on the side of the central axis surface 114 where the wastewater valve 180 is located, thereby reducing the volume of the filter element assembly 100. At the same time, it can avoid interference between the one-way valve 160 and the three-sided valve 140, thus facilitating the installation of the one-way valve 160, the three-sided valve 140 and the wastewater valve 180 on the water circuit structure 113.

[0117] Specifically, referring to Figure 3, the three-way valve 140 is located on the side of the second mounting base 1122 closer to the first mounting base 1121. The one-way valve 160 and the wastewater valve 180 are located on both sides of the central axis surface 114, respectively. Both the one-way valve 160 and the wastewater valve 180 are located on the side of the second mounting base 1122 away from the first mounting base 1121. It can be understood that the second mounting base 1122 is located between the three-way valve 140 and the wastewater valve 180. This arrangement can make full use of the space on both sides of the water circuit structure 113 on the central axis surface 114, as well as the space on both sides of the second mounting base 1122 in the direction of approaching or away from the first mounting base 1121, thereby reducing the volume of the filter element assembly 100.

[0118] Please refer to Figures 3 and 4. In some embodiments of this application, the plurality of filter cartridge mounting bases 112 further include a fourth mounting base 1124, and the filter cartridge assembly 100 further includes a post-treatment filter cartridge 100d. The post-treatment filter cartridge 100d is coaxially mounted with the fourth mounting base 1124 to connect to the water channel 1131, and along the water flow direction, the post-treatment filter cartridge 100d is located downstream of the reverse osmosis filter cartridge 100b. With this configuration, the post-treatment filter cartridge 100d removes substances such as discoloration, odor, and taste from the water, while adsorbing large molecular organic matter in the water, thereby further improving the filtration effect of the water purifier 1000. The post-treatment filter cartridge 100d can be a granular activated carbon filter cartridge, or it can be a compressed activated carbon filter cartridge; no specific limitation is made here.

[0119] Please refer to Figure 4, where the one-way valve 160 is located between the second mounting base 1122 and the fourth mounting base 1124. This arrangement reduces the distance between the outlet of the one-way valve 160 and the second outlet of the three-way valve 140, thereby reducing the length of the pressure pipe 170 and thus reducing the volume of the filter element assembly 100.

[0120] The wastewater valve 180 is located between the second mounting base 1122 and the fourth mounting base 1124. This arrangement brings the wastewater valve 180 close to the reverse osmosis filter element 100b, thereby reducing the length of the water passage 1131 connecting the wastewater inlet of the reverse osmosis filter element 100b and the wastewater valve 180, and thus reducing the volume of the filter element assembly 100.

[0121] Referring to Figure 4, in some embodiments of this application, the plurality of filter element mounting bases 112 further include a fifth mounting base 1125, and the filter element assembly 100 further includes a mineralizing filter element 100e. The mineralizing filter element 100e is coaxially mounted with the fifth mounting base 1125 to connect to the water passage 1131, and along the water flow direction, the mineralizing filter element 100e is located downstream of the post-treatment filter element 100d. With this configuration, the water quality can be further improved through the mineralizing filter element 100e.

[0122] The primary function of the 100e mineral filter cartridge is to replenish minerals and improve water quality. In addition, the 100e mineral filter cartridge also regulates the pH level of the water. By adjusting the pH to a slightly alkaline environment, the 100e mineral filter cartridge helps improve the taste and nutritional value of the water, making it more suitable for human health. Water treated in this way is not only healthier but also has better permeability, diffusion, and dissolving power, thus improving the overall quality of the water.

[0123] The 100e mineralized filter cartridge is primarily made of maifan stone. Maifan stone is a composite mineral or medicinal rock that is non-toxic, harmless, and possesses certain biological activity. Its chemical composition includes common elements such as Ca, Mg, Si, Al, Fe, K, and Na, as well as trace amounts of rare elements, rare earth elements, and radioactive elements. Maifan stone possesses properties such as adsorption, solubility, pH adjustment, biological activity, and mineralization.

[0124] Referring to Figure 3, in some embodiments of this application, the filter element assembly 100 further includes a flow meter 120. The flow meter 120 is installed on the water channel structure 113 to connect to the water channel 1131, and along the water flow direction, the flow meter 120 is located upstream of the pretreatment filter element 100a, with the central axial surface 114 transversely intersecting the flow meter 120. With this configuration, the flow meter 120, connected to the water channel 1131, can detect the flow rate of the water channel 1131, thereby determining whether the filter element needs to be replaced based on the detection results. Furthermore, it can fully utilize the space within the water channel 1131, reducing the volume of the filter element assembly 100. The flow meter 120 and the circuit board 130 can be electrically connected via wires, or wirelessly. Preferably, the flow meter 120 and the circuit board 130 can also be electrically connected wirelessly, thus preventing water in the water channel 1131 from affecting the circuit board 130.

[0125] Furthermore, the filter element assembly 100 also includes an alarm and a circuit board 130. The circuit board 130 is electrically connected to the flow meter 120 and the alarm. The circuit board 130 can control the alarm to operate based on the detection results of the flow meter 120. With this configuration, the circuit board 130 can determine the flow rate through the detection structure of the flow meter 120. When the flow rate detected by the flow meter 120 reaches a preset value, the circuit board 130 will control the alarm to operate, prompting the user to replace the filter element of the filter element assembly 100.

[0126] Specifically, the filter assembly 100 also includes a battery, which is electrically connected to the circuit board 130. The battery is configured to power the circuit board 130, the flow meter 120, and the alarm. This configuration, where the circuit board 130 is powered by the battery, eliminates the need for an external power source for the filter assembly 100, thereby improving its usability. Many types of batteries are available, including lithium-ion button batteries and lithium-manganese button batteries; no specific limitation is made here.

[0127] Referring to Figure 4, in some embodiments of this application, the water circuit board 110 has a receiving groove 115, which is located on one side of the central axis surface 114. The circuit board 130, the alarm, and the battery are all installed in the receiving groove 115. This arrangement allows the water circuit board 110 to protect the circuit board 130, the alarm, and the battery. The shape of the receiving groove can be various; it can be cylindrical or square, and no specific limitation is made here.

[0128] Specifically, please refer to Figure 3. The receiving slot 115 is positioned adjacent to the flow meter 120. With this configuration, the circuit board 130 can better receive the detection results from the flow meter 120.

[0129] Furthermore, referring to Figure 4, the filter assembly 100 also includes a cover 116, which covers the opening of the receiving groove 115 to seal the receiving groove 115. With this arrangement, the cover 116 and the receiving groove 115 work together to seal and protect the circuit board 130, thereby preventing the water in the water channel 1131 from affecting the circuit board 130 and causing short circuit damage to the circuit in the circuit board 130.

[0130] Referring to Figure 2, in some embodiments of this application, the plurality of filter element mounting bases 112 further include a third mounting base 1123, and the filter element assembly 100 further includes a PP cotton filter element 100c. The PP cotton filter element 100c is coaxially mounted with the third mounting base 1123 to connect to the water passage 1131, and along the water flow direction, the PP cotton filter element 100c is located upstream of the flow meter 120. This arrangement allows the PP cotton filter element 100c to filter large particles in the water, thereby preventing large particles in the water from affecting the flow meter 120.

[0131] Specifically, please refer to Figures 3 and 4. The water channel 1131 includes a first flow channel 113a, a second flow channel 113b, a third flow channel 113c, a fourth flow channel 113d, a fifth flow channel 113e, a sixth flow channel 113g, a seventh flow channel 113h, an eighth flow channel 113i, and a wastewater channel 113f. One end of the first flow channel 113a is connected to the inlet of the water channel plate 110, and the other end of the first flow channel 113a is connected to the inlet of the PP cotton filter element 100c through the third mounting base 1123. The outlet of the PP cotton filter element 100c is connected to the third mounting base 1123. The third flow channel 113b is connected to the inlet of the flow meter 120; one end of the second flow channel 113b is connected to the outlet of the flow meter 120, and the other end of the second flow channel 113b is connected to the inlet of the pretreatment filter element 100a through the first mounting base 1121; one end of the third flow channel 113c is connected to the outlet of the pretreatment filter element 100a through the first mounting base 1121, and the other end of the third flow channel 113c is connected to the first inlet of the three-sided valve 140; one end of the fourth flow channel 113d is connected to the outlet of the three-sided valve 140, and the other end of the fourth flow channel 113d is connected to the first inlet of the three-sided valve 140 through the second mounting base 1121. 22 is connected to the inlet of reverse osmosis filter element 100b; one end of the fifth flow channel 113e is connected to the outlet of reverse osmosis filter element 100b through the second mounting base 1122, and the other end of the fifth flow channel 113e is connected to the inlet of one-way valve 160; one end of the sixth flow channel 113g is connected to the outlet of one-way valve 160, and the other end of the sixth flow channel 113g is connected to pressure tank 150, and is connected to the inlet of post-treatment filter element 100d through the fourth mounting base 1124, and is connected to the second inlet of three-way valve 140 through pressure pipe 170; the seventh flow channel 113h One end of the seventh channel 113h is connected to the outlet of the post-treatment filter element 100d via the fourth mounting base 1124; the other end of the seventh channel 113h is connected to the inlet of the mineralization filter element 100e via the fifth mounting base 1125; one end of the eighth channel 113i is connected to the outlet of the mineralization filter element 100e via the fifth mounting base 1125; the other end of the eighth channel 113i is connected to the outlet of the water circuit plate 110; one end of the wastewater channel 113f is connected to the wastewater outlet of the reverse osmosis filter element 100b via the second mounting base 1122; the other end of the wastewater channel 113f is connected to the wastewater valve 180.

[0132] Tap water first enters the first flow channel 113a through the inlet of the water circuit board 110, then flows into the PP cotton filter element 100c. After being filtered by the PP cotton filter element 100c, it passes through the flow meter 120 and enters the second flow channel 113b. Through the second flow channel 113b, it enters the pretreatment filter element 100a, then sequentially passes through the third flow channel 113c and the three-way valve 140 into the fourth flow channel 113d. Finally, through the fourth flow channel 113d, it enters the reverse osmosis filter element 100b, where it is filtered to produce two... One branch enters the wastewater channel 113f through the wastewater outlet of the reverse osmosis filter element 100b and is discharged from the drain outlet of the water circuit plate 110 through the wastewater valve 180. The other branch, after being filtered by the reverse osmosis filter element 100b, enters the fifth flow channel 113e through the outlet of the reverse osmosis filter element 100b and enters the sixth flow channel 113g through the one-way valve 160. It then enters the post-treatment filter element 100d through the sixth flow channel 113g and is discharged from the outlet of the water circuit plate 110 through the seventh flow channel 113h, the mineralization filter element 100e, and the eighth flow channel 113i in sequence.

[0133] When the water inlet stops discharging water, tap water first enters the first flow channel 113a from the inlet of the water circuit board 110, then enters the PP cotton filter element 100c through the first flow channel 113a, and after being filtered by the PP cotton filter element 100c, it enters the second flow channel 113b through the flow meter 120, then enters the pretreatment filter element 100a through the second flow channel 113b, and after passing through the pretreatment filter element 100a, it sequentially passes through the third flow channel 113c and the three-way valve 140 to enter the fourth flow channel 113d, and then enters the reverse osmosis filter element 100b through the fourth flow channel 113d. After being filtered by the reverse osmosis filter element 100b, it enters the fifth flow channel 113e from the outlet of the reverse osmosis filter element 100b, and then enters the sixth flow channel 113g through the one-way valve 160, and flows into the pressure tank 150 through the sixth flow channel 113g until the three-way valve 140 closes the connection between the first inlet and outlet.

[0134] When the water purifier 1000 starts discharging water, the water in the pressure tank 150 will enter the post-treatment filter element 100d through the sixth flow channel 113g, and then be discharged from the outlet of the water circuit board 110 through the seventh flow channel 113h, the mineralization filter element 100e, and the eighth flow channel 113i in sequence.

[0135] Typically, the post-treatment filter cartridge 100d uses an activated carbon filter. When the activated carbon filter is first used, there will be a slight carbon powder phenomenon. The sixth flow channel 113g connects the post-treatment filter cartridge 100d and the pressure tank 150, so that the pressure tank 150 only stores pure water filtered by the reverse osmosis filter cartridge 100b. This avoids the carbon powder in the water filtered by the post-treatment filter cartridge 100d remaining in the pressure tank 150 and affecting the subsequent water quality. At the same time, the post-treatment filter cartridge 100d is located downstream of the pressure tank 150, so that the post-treatment filter cartridge 100d can also remove the odor from the water discharged from the pressure tank 150.

[0136] Please refer to Figures 3 and 4. Considering that the wastewater outlet of the reverse osmosis filter element 100b is located on the central axis of the reverse osmosis filter element 100b, the central axis surface 114 is transversely cut across the second flow channel 113b, the third flow channel 113c, the fourth flow channel 113d, the wastewater channel 113f, and the seventh flow channel 113h; the fifth channel is located on the side of the central axis surface 114 where the one-way valve 160 is located. This arrangement makes full use of the space of the water circuit structure 113 on the central axis surface 114, and since the fifth channel is located on the side of the central axis surface 114 where the one-way valve 160 is located, the distance between the one-way valve 160 and the fifth flow channel 113e is reduced, which can effectively reduce the length of the fifth flow channel 113e and facilitate the connection between the one-way valve 160 and the fifth flow channel 113e.

[0137] Further, referring to Figure 5, a relief groove 113j is recessed on the inner wall of the sixth flow channel 113g near the post-treatment filter element 100d. The bottom of the relief groove 113j is connected to the water inlet of the post-treatment filter element 100d. The relief groove 113j is located between the connection port of the water circuit 1131 connecting the pressure tank 150 and the one-way valve 160. With this configuration, when the water purifier 1000 starts discharging water, the water flowing into the sixth flow channel 113g through the one-way valve 160 will first enter the relief groove 113j, and the water from the pressure tank 150 will also first enter the relief groove 113j. This avoids the water flowing into the sixth flow channel 113g through the one-way valve 160 and the water from the pressure tank 150 from interfering with each other and preventing the water from smoothly entering the post-treatment filter element 100d.

[0138] Preferably, the inner wall of the sixth flow channel 113g is further provided with two water-blocking parts 113k, and the clearance groove 113j is located between the two water-blocking parts 113k, so that the water in the pressure tank 150 and the water flowing into the sixth flow channel 113g through the one-way valve 160 will cross the two water-blocking parts 113k respectively and enter the clearance groove 113j, thereby further preventing the water flowing into the sixth flow channel 113g through the one-way valve 160 and the water in the pressure tank 150 from affecting each other.

[0139] In some embodiments of this application, the distance between the central axes of two adjacent filter element mounting bases 112 is 'a', where 57mm ≤ a ≤ 141mm. This arrangement can reduce the volume of the filter element assembly 100. Preferably, the distance between the central axes of two adjacent filter element mounting bases 112 is 82.5mm.

[0140] Please refer to Figures 6 and 7 together. In some embodiments of this application, the pretreatment filter element 100a includes a filter element body 101a and a drive part 102a. The drive part 102a is installed on the filter element body 101a. The filter element body 101a can be integrally formed with the drive part 102a, or the filter element body 101a can be detachably connected to the drive part 102a. No specific limitation is made here.

[0141] Each filter element mounting base 112 has the same structure. It can be understood that the first mounting base 1121, the second mounting base 1122, the third mounting base 1123, the fourth mounting base 1124 and the fifth mounting base 1125 have the same structure. Taking the first mounting base 1121 as an example, the first mounting base 1121 includes a base body 112a, a rotating member 112b and a transmission part 112c. The base body 112a is connected to the water passage 1131. The rotating member 112b is rotatably mounted on the base body 112a to connect or block the water passage 1131. The transmission part 112c is disposed on the rotating member 112b. The driving part 102a can be inserted and cooperated with the corresponding transmission part 112c to drive the rotating member 112b to rotate. With this configuration, when the user replaces the pretreatment filter element 100a, rotating the pretreatment filter element 100a will cause the drive unit 102a to drive the transmission unit 112c to move, thereby causing the rotating component 112b to rotate and block the water passage 1131, thus stopping the water flow upon removing the filter element. When installing the pretreatment filter element 100a, the user inserts the drive unit 102a of the pretreatment filter element 100a into the transmission unit 112c of the rotating component 112b, and then rotates the pretreatment filter element 100a. The drive unit 102a will drive the transmission unit 112c to move, thereby causing the rotating component 112b to rotate and open the water passage 1131.

[0142] Furthermore, please refer to Figures 6 and 7 together. The pretreatment filter element 100a also includes a guide portion 103a. The guide portion 103a is installed on the filter element body 101a. The filter element body 101a can be integrally formed with the guide portion 103a, or the filter element body 101a can be detachably connected with the guide portion 103a. No specific limitation is made here.

[0143] The base 112a is provided with a mounting groove 112d. The rotating component 112b is rotatably mounted on the bottom of the mounting groove 112d, and the transmission part 112c is located on the surface of the rotating component 112b facing away from the bottom of the mounting groove 112d. The mounting groove 112d can have many shapes; it can be cylindrical or boss-shaped, as long as it does not affect the rotation of the rotating component 112b. No specific limitation is made here. The rotating component 112b is located at the bottom of the mounting groove 112d, so that the drive part 102a of the pretreatment filter element 100a must extend into the mounting groove 112d to cooperate with the transmission part 112c of the rotating component 112b. Thus, the base 112a can protect the rotating component 112b and the drive part 102a.

[0144] The first mounting base 1121 also includes a guide protrusion 112e, which protrudes from the wall of the mounting groove 112d and extends circumferentially along the mounting groove 112d. The guide portion 103a can extend between the guide protrusion 112e and the bottom of the mounting groove 112d. With this configuration, when the pretreatment filter element 100a rotates, the guide protrusion 112e and the bottom of the mounting groove 112d limit the guide portion 103a in the direction of the central axis of the pretreatment filter element 100a, thus ensuring that the guide portion 103a can only move along the extending direction of the guide protrusion 112e (i.e., the circumferential direction of the mounting groove 112d), thereby facilitating user operation. Simultaneously, after the pretreatment filter element 100a is installed, the guide portion 103a and the guide protrusion 112e can cooperate to limit the pretreatment filter element 100a, allowing it to be mounted on the base 112a.

[0145] Please refer to Figures 6 and 7. Considering that without an upper limit on the rotation direction of the pretreatment filter element 100a, the user cannot determine whether the pretreatment filter element 100a is installed in the designated position, the first mounting base 1121 also includes a limiting protrusion 112f. One end of the limiting protrusion 112f is connected to one end of a guide protrusion 112e in the circumferential direction of the mounting groove 112d, and the other end of the limiting protrusion 112f extends axially towards the bottom of the mounting groove 112d. With this configuration, when installing the pretreatment filter element 100a, the user can simply rotate the pretreatment filter element 100a until the guide portion 103a of the pretreatment filter element 100a abuts against the limiting protrusion 112f, thus facilitating user operation.

[0146] Specifically, please refer to Figures 6 and 7 together. The number of guide portions 103a of the pretreatment filter element 100a is two; the number of guide protrusions 112e and limiting protrusions 112f are both two. The two guide protrusions 112e are arranged at intervals in the circumferential direction of the mounting groove 112d to form two clearance channels 112g. The guide protrusions 112e and the limiting protrusions 112f are arranged in a one-to-one correspondence. The limiting protrusions 112f are located at the end of the corresponding guide protrusion 112e away from the other limiting protrusion 112f. With this configuration, when installing the pretreatment filter element 100a, the pretreatment filter element 100a is first inserted into the mounting groove 112d along the central axis of the first mounting base 1121. The guide part 103a passes through the clearance channel 112g. The guide part 103a is limited by the limiting protrusion 112f on one side of the mounting groove 112d in the circumferential direction, so that the pretreatment filter element 100a can only rotate in the preset direction, thereby avoiding the user from turning it in the wrong direction and causing the pretreatment filter element 100a to not be installed properly.

[0147] Further, referring to Figures 6 and 7, a guide slope 112h is provided on the side where the guide protrusion 112e connects to the limiting protrusion 112f. The guide slope 112h extends from the bottom of the mounting groove 112d toward the adjacent clearance channel 112g. With this configuration, when installing the pretreatment filter element 100a, the pretreatment filter element 100a is first inserted into the mounting groove 112d along the central axis of the first mounting base 1121. At this time, the guide part 103a will abut against the guide slope 112h, thereby guiding the guide part 103a into the clearance channel 112g. At the same time, it can indicate the rotation direction of the pretreatment filter element 100a, thus facilitating user operation.

[0148] Please refer to Figures 6 and 7. In some embodiments of this application, a positioning groove 112i is recessed on one side of the guide protrusion 112e facing the bottom of the corresponding mounting groove 112d. The pretreatment filter element 100a also includes a positioning part 104a, which protrudes from the surface of the guide part 103a facing the guide protrusion 112e. When the first mounting base 1121 is connected to the water channel 1131, the positioning part 104a and the positioning groove 112i are inserted into each other. With this configuration, after the pretreatment filter element 100a is installed in the designated position, the positioning part 104a and the positioning groove 112i of the pretreatment filter element 100a are inserted into each other, thereby limiting the circumferential movement of the pretreatment filter element 100a and preventing the filter element assembly 100 from rotating due to external influences, which would cause the pretreatment filter element 100a to detach from the first mounting base 1121. When disassembling the pretreatment filter element 100a, the pretreatment filter element 100a needs to be pushed towards the bottom of the mounting groove 112d so that the positioning part 104a disengages from the positioning groove 112i. Then, the pretreatment filter element 100a is rotated, and finally, the pretreatment filter element 100a is removed from the mounting groove 112d along the central axis of the first mounting seat 1121.

[0149] It should be noted that the structures of PP cotton filter element 100c, reverse osmosis filter element 100b, post-treatment filter element 100d, and mineralization filter element 100e are the same as those of the pre-treatment filter element 100a, and are connected to the corresponding filter element mounting base 112.

[0150] Referring to Figure 1, this application also proposes a water purifier 1000, which includes a housing 200 and the aforementioned filter element assembly 100. The housing 200 covers the side of the water passage structure 113 facing away from the filter element mounting base 112. The housing 200 can protect the filter element mounting base 112. The housing 200 can be made of metal or a relatively hard plastic; no specific limitation is made here. There are many ways to install the housing 200 onto the filter element assembly 100. The housing 200 can be installed onto the filter element assembly 100 by means of screw connection or by means of snap-fit ​​connection; no specific limitation is made here.

[0151] Referring to Figure 1, in some embodiments of this application, the water purifier 1000 further includes a decorative panel 300, which is installed on the outer peripheral wall of the housing 200. This arrangement makes the product more aesthetically pleasing. Simultaneously, since the outer periphery of the housing 200 is easily damaged by impacts, the decorative panel 300 protects the outer periphery of the housing 200. If the decorative panel 300 is damaged by impact, only the decorative panel 300 needs to be replaced, thereby reducing the maintenance cost of the water purifier 1000. The decorative panel 300 can be made of metal or a harder plastic; no specific limitation is made here. The decorative panel 300 can be installed on the housing 200 by screw connection or by snap-fit ​​connection; no specific limitation is made here.

[0152] Preferably, the outer peripheral wall of the outer casing 200 is recessed with a mounting groove, and the decorative panel 300 is installed in the mounting groove. This allows the decorative panel 300 to be accommodated in the mounting groove, thereby reducing the volume of the water purifier 1000.

[0153] In some embodiments of this application, the water purifier 1000 further includes a housing with a mounting cavity. The filter element assembly 100 is installed inside the housing, and the outer shell 200 is located within the mounting cavity. This arrangement allows the housing to protect the filter element assembly 100. The housing can be made of metal or a relatively rigid plastic; no specific limitation is made here. The filter element assembly 100 can be installed in the mounting cavity via the water passage structure 113, or it can be installed in the mounting cavity via the outer shell 200; no specific limitation is made here.

[0154] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0155] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0156] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0157] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0158] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A filter element assembly, wherein, include: A water circuit board includes a board body, a plurality of filter element mounting seats disposed on the board body, and a water circuit structure disposed on the filter element mounting seats. The central axis of the plurality of filter element mounting seats defines a central axis surface. The water circuit structure has a water circuit that connects the plurality of filter element mounting seats in sequence. The plurality of filter element mounting seats include at least a first mounting seat and a second mounting seat. The pretreatment filter element is coaxially mounted with the first mounting base to connect to the water circuit; The reverse osmosis filter element is coaxially mounted with the second mounting base to connect to the water circuit, and along the water flow direction, the reverse osmosis filter element is located downstream of the pretreatment filter element; A three-sided valve is installed on the water circuit structure and located on one side of the central axis surface. The first inlet of the three-sided valve is connected to the outlet of the pretreatment filter element through the water circuit, and the outlet of the three-sided valve is connected to the inlet of the reverse osmosis filter element through the water circuit. The pressure tank is connected to the outlet of the reverse osmosis filter element and the second inlet of the three-sided valve via the water passage; and A one-way valve is installed between the reverse osmosis filter element and the pressure tank, allowing water from the reverse osmosis filter element to flow unidirectionally to the pressure tank.

2. The filter element assembly as claimed in claim 1, wherein, The three-sided valve is located between the first mounting base and the second mounting base.

3. The filter element assembly as described in claim 1, wherein, The inner wall of the water passage is recessed with a relief groove. The bottom of the relief groove is connected to the outlet of the water passage plate. The relief groove is located between the connection port of the water passage to the pressure tank and the one-way valve.

4. The filter element assembly as described in any one of claims 1-3, wherein, Also includes: A pressure pipe is installed on the water circuit structure and located on the side of the central axis away from the three-sided valve. The pressure tank is connected to the second water inlet through the pressure pipe.

5. The filter element assembly as claimed in claim 4, wherein, The one-way valve is installed on the water circuit structure and is located on the side of the central axis opposite to the three-sided valve.

6. The filter element assembly as claimed in claim 5, wherein, The one-way valve and the pressure pipe are partially stacked and spaced apart in the vertical direction.

7. The filter element assembly as described in any one of claims 4-6, wherein, Also includes: A wastewater valve is installed on the water circuit structure and located on one side of the central axis surface. The wastewater valve is connected to the wastewater outlet of the reverse osmosis filter element through the water circuit, allowing only the wastewater from the reverse osmosis filter element to flow unidirectionally to the drain outlet of the water circuit plate.

8. The filter element assembly as described in claim 7, characterized in that, The wastewater valve and the one-way valve are located on opposite sides of the central axial surface.

9. The filter element assembly as claimed in claim 8, wherein, The plurality of filter element mounting bases further include a fourth mounting base, and the filter element assembly further includes: The post-treatment filter element is coaxially mounted with the fourth mounting base to connect to the water path, and along the water flow direction, the post-treatment filter element is located downstream of the reverse osmosis filter element; Wherein, the one-way valve is located between the second mounting base and the fourth mounting base; and / or, The wastewater valve is located between the second mounting base and the fourth mounting base.

10. The filter element assembly as claimed in claim 9, wherein, The plurality of filter element mounting bases further include a fifth mounting base, and the filter element assembly further includes: The mineralizing filter element is coaxially mounted with the fifth mounting base to connect to the water path, and along the water flow direction, the mineralizing filter element is located downstream of the post-treatment filter element.

11. The filter assembly of claim 10, wherein, Also includes: A flow meter is installed on the water circuit structure to connect to the water circuit, and along the water flow direction, the flow meter is located upstream of the pretreatment filter element, and the central axial surface is transverse to the flow meter.

12. The filter element assembly of claim 11, wherein, Also includes: Alarm; as well as, The circuit board is electrically connected to the flow meter and the alarm, and the circuit board can control the alarm to work based on the detection results of the flow meter.

13. The filter element assembly of claim 12, wherein, Also includes: The battery is electrically connected to the circuit board and is configured to power the circuit board, the flow meter, and the alarm.

14. The filter assembly of claim 15, wherein, The water circuit board has a receiving groove located on one side of the central axis surface, and the circuit board, the alarm and the battery are all installed in the receiving groove.

15. The filter assembly of claim 17, wherein, The receiving slot is located adjacent to the flow meter.

16. The filter assembly of claim 15, wherein, Also includes: A cover is provided on the opening of the receiving groove to seal the receiving groove.

17. The filter element assembly as claimed in any one of claims 11-16, wherein, The plurality of filter element mounting bases further include a third mounting base, and the filter element assembly further includes: The PP cotton filter element is coaxially mounted with the third mounting base to connect to the water path, and along the water flow direction, the PP cotton filter element is located upstream of the flow meter.

18. The filter assembly of claim 17, wherein, The waterway includes: The first flow channel has one end connected to the inlet of the water circuit board, and the other end connected to the inlet of the PP cotton filter element through the third mounting base. The outlet of the PP cotton filter element is connected to the inlet of the flow meter through the third mounting base. The second flow channel is connected at one end to the outlet of the flow meter and at the other end to the inlet of the pretreatment filter element through the first mounting base. The third flow channel has one end connected to the outlet of the pretreatment filter element through the first mounting base, and the other end connected to the first inlet of the three-sided valve. The fourth flow channel is connected at one end to the outlet of the three-sided valve and at the other end to the inlet of the reverse osmosis filter element through the second mounting base. The fifth flow channel is connected at one end to the outlet of the reverse osmosis filter element via the second mounting base, and at the other end to the inlet of the one-way valve. The wastewater channel has one end connected to the wastewater outlet of the reverse osmosis filter element via the second mounting base, and the other end connected to the wastewater valve. The sixth flow channel is connected at one end to the outlet of the one-way valve, at the other end to the pressure tank, and is connected to the inlet of the post-treatment filter element through the fourth mounting base, and is also connected to the second inlet of the three-sided valve through the pressure pipe. The seventh flow channel has one end connected to the outlet of the post-treatment filter element via the fourth mounting base, and the other end connected to the inlet of the mineralization filter element via the fifth mounting base; and The eighth flow channel is connected at one end to the outlet of the mineralized filter element via the fifth mounting base, and at the other end to the outlet of the water circuit plate.

19. The filter assembly of claim 18, wherein, The central axial surface transversely cuts through the second flow channel, the third flow channel, the fourth flow channel, the wastewater channel, and the seventh flow channel; The fifth channel is located on the side of the central axial surface where the one-way valve is located.

20. The filter element assembly according to any one of claims 17-19, wherein, The distance between the central axes of two adjacent filter element mounting bases is a, where 57mm≤a≤141mm.

21. The filter element assembly according to any one of claims 1-20, wherein, The pretreatment filter element includes a filter element body and a drive unit. The drive unit is installed on the filter element body, and the structure of each filter element mounting base is the same. The first mounting base includes: The base is connected to the waterway; A rotating component, rotatably mounted on the base, to connect or block the water passage; and A transmission unit is disposed on the rotating member; The driving unit can be plugged into the transmission unit to drive the rotating component to rotate.

22. The filter assembly of claim 21, wherein, The pretreatment filter element also includes a guide portion, which is installed on the filter element body; The base is provided with a mounting groove, the rotating component is rotatably mounted on the bottom of the mounting groove, and the transmission part is located on the surface of the rotating component opposite to the bottom of the mounting groove. The first mounting base further includes: A guide protrusion protrudes from the wall of the mounting groove and extends circumferentially along the mounting groove; The guide portion can extend between the guide protrusion and the bottom of the mounting groove.

23. The filter assembly of claim 22, wherein, The first mounting base further includes: The limiting protrusion has one end connected to one end of the guide protrusion in the circumferential direction of the mounting groove, and the other end extends along the axial direction of the mounting groove toward the bottom of the mounting groove.

24. The filter assembly of claim 23, wherein, The number of guide portions in the pretreatment filter element is two; The number of the guide protrusion and the limiting protrusion are both two. The two guide protrusions are spaced apart in the circumferential direction of the mounting groove to form two clearance channels. The guide protrusion and the limiting protrusion are arranged in a one-to-one correspondence. The limiting protrusion is disposed at the end of the corresponding guide protrusion away from the other limiting protrusion.

25. The filter assembly of claim 24, wherein, A guide slope is provided on the side where the guide protrusion connects to the limiting protrusion. The guide slope extends from the direction close to the bottom of the mounting groove toward the direction close to the adjacent clearance channel.

26. The filter element assembly as claimed in any one of claims 22-25, wherein, The guide protrusion is recessed into a positioning groove on one side facing the bottom of the corresponding mounting groove. The pretreatment filter element also includes: The positioning part protrudes from the surface of the guide part facing the guide protrusion; When the first mounting base is connected to the water channel, the positioning part is inserted into the positioning groove.

27. A water purifier, wherein, include: shell; as well as The filter assembly as described in any one of claims 1 to 26; The outer casing is located on the side of the water passage structure opposite to the filter element mounting base.

28. The water purifier as described in claim 27, wherein, include: Decorative panels are installed on the outer peripheral wall of the housing.

29. The water purifier according to any one of claims 27-28, wherein, include: The housing has an installation cavity, in which the filter element assembly is installed.

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